I have been researching Kenwood repairs as I think I'll be needing as well.
In this order, I have:
Unfortunately, Tim is closed until the middle of April, but I expect he'll be going great guns when he returns.
Clairmont Skyland Radio and Tv Services looks like a very good bet.
Do check with these guys. I don't have a good sense of them but well worth a shot.
I'm sure there are a few others that haven't made it to my radar yet.
Good luck.
Charlie
WB4FAW